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GST Calculator (Free Online)

Calculate GST amount, inclusive and exclusive prices instantly. Use this free GST calculator to add or remove GST with accurate results for invoices and billing.

GST Calculator
Includes GST?
Same State (CGST + SGST)
Enter amount to calculate GST
GST = Amount × Rate / 100 · Inclusive: Base = Amount / (1 + Rate)

How to calculate GST

GST calculation helps determine the tax amount included in a product or service price.

Step 1

Enter Amount

Input the base price or total amount for GST calculation.

Step 2

Select GST Rate

Choose the applicable GST percentage such as 5%, 12%, 18%, or 28%.

Step 3

Get GST Value

View GST amount along with total or base value instantly.

Why use this tool?

Calculate GST inclusive and exclusive values instantly

Useful for invoicing and billing accuracy

Supports multiple GST rate slabs

Saves time on manual tax calculations

Ideal for businesses, freelancers, and accountants

Frequently Asked Questions

What is GST?

How to calculate GST from total amount?

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GST Calculator (Free Online) | BillsDeck